linux-kernel - [PATCH 0/2] nbcon locking issue with v6.6.10-rt18 kernel

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Message-Id: <20240123054033.183114-1-junxiao.chang@intel.com>
Date: Tue, 23 Jan 2024 13:40:31 +0800
From: Junxiao Chang <junxiao.chang@...el.com>
To: bigeasy@...utronix.de,
	tglx@...utronix.de,
	rostedt@...dmis.org,
	linux-kernel@...r.kernel.org
Cc: john.ogness@...utronix.de,
	hao3.li@...el.com,
	lili.li@...el.com,
	jianfeng.gao@...el.com,
	linux-rt-users@...r.kernel.org
Subject: [PATCH 0/2] nbcon locking issue with v6.6.10-rt18 kernel

There are two serial port devices in one Intel ADL hardware, one is 8250 lpss, another is 8250 dw. Multiple uart devices are enumerated as ttyS0, ttyS4, ttyS5,... With 6.6.10 rt18 kernel, booting hangs in nbcon_release if console is enabled by appending "console=ttySx,115200n8" to kernel command line. According to nbcon author John's suggestion, lock flag is moved from console structure to uart_port. Another patch is to add uart_is_nbcon checking in nbcon_release. 

Junxiao Chang (2):
  printk: nbcon: move locked_port flag to struct uart_port
  printk: nbcon: check uart port is nbcon or not in nbcon_release

 include/linux/console.h     |  2 --
 include/linux/serial_core.h |  1 +
 kernel/printk/nbcon.c       | 11 +++++++----
 3 files changed, 8 insertions(+), 6 deletions(-)

-- 
2.34.1